URM - Direct Triggers

Does the Content Server within URM have the ability to set the following Direct Trigger -
Example Concept idoc
<$if (dateCurrent(30) = parseDate(dOutDate)$>
     <$c="Run Direct Trigger"$>
<$endif$>

I want the trigger to run 30 days before dOutDate (Document Expiry Date);
This is so I can setup a email notification to tell the users the file is about to expire within my disposition lifecycle rule..


Will I have to create a custom component to modify and append my option to URM?
Or would the following work if I added -

(dateCurrent(30) = parseDate(dOutDate) to Content Date Field(s) input area?

Thanks